<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区域 -->
        <el-card>
            <el-row :gutter="20">
                <el-col :span="8">
                    <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable="" @clear="getGoodsList">
                        <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
                    </el-input>
                </el-col>
                <el-col :span="4">
                    <el-button type="primary" @click="goAddPage">添加商品</el-button>
                </el-col>
            </el-row>

                <!-- 表格区域 -->
            <el-table :data="goodsList" border stripe>
                <el-table-column type="index"></el-table-column>
                <el-table-column label="商品名称" prop="goods_name"></el-table-column>
                <el-table-column label="商品价格(元)" prop="goods_price" width="95px"></el-table-column>
                <el-table-column label="商品重量" prop="goods_weight" width="95px"></el-table-column>
                <el-table-column label="创建时间" prop="add_time" width="140px">
                    <template slot-scope="scope">
                        {{scope.row.add_time | dateFormat}}
                    </template>
                </el-table-column>
                <el-table-column label="操作" width="125px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit"></el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeGoods(scope.row.goods_id)"></el-button>
                    </template>
                </el-table-column>
            </el-table>

            <!-- 分页 -->
            <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="queryInfo.pagenum" :page-sizes="[3, 5, 10, 15]" :page-size="queryInfo.pagesize" layout="total, sizes, prev, pager, next, jumper" :total="total" background>
            </el-pagination>
        </el-card>
    </div>
</template>

<script>
export default {
    data() {
        return {
            // 查询参数
            queryInfo: {
                query: '',
                pagenum: 1,
                pagesize: 10
            },
            // 保存商品列表信息
            goodsList: [],
            // 总数据条数
            total: 0
        }
    },
    created() {
        this.getGoodsList()
    },
    methods: {
        async getGoodsList() {
        //   根据分页获取对应的商品列表
        const { data: res } = await this.$http.get('goods', {
            params: this.queryInfo
        })

        if (res.meta.status !== 200) {
            return this.$message.error('获取商品列表失败')
        }
        console.log(res.data)
        this.$message.success('获取商品列表成功')
        this.goodsList = res.data.goods
        this.total = res.data.total
        },
        handleSizeChange(newSize) {
            // 当页号发生改变时，更改pagesize，重新请求
            this.queryInfo.pagesize = newSize
            this.getGoodsList()
        },
        handleCurrentChange(newPage) {
            // 当页码发生改变时，更改pagesize，重新请求
            this.queryInfo.pagenum = newPage
            this.getGoodsList()
        },
        // 事件函数代码编写
        async removeGoods(goodsId) {
            // 根据id删除对应的参数或属性
            // 弹窗提示用户是否要删除
            const confirmResult = await this.$confirm(
                '请问是否要删除该商品',
                '删除提示',
                {
                confirmButtonText: '确认删除',
                cancelButtonText: '取消',
                type: 'warning'
                }
            ).catch(err => err)
            // 如果用户点击确认，则confirmResult 为'confirm'
            // 如果用户点击取消, 则confirmResult获取的就是catch的错误消息'cancel'
            if (confirmResult !== 'confirm') {
                return this.$message.info('已经取消删除')
            }

            // 没有取消就是要删除，发送请求完成删除
            const { data: res } = await this.$http.delete(`goods/${goodsId}`)

            if (res.meta.status !== 200) {
                return this.$message.error('删除商品失败')
            }

            this.$message.success('删除商品成功')
            this.getGoodsList()
        },
        // 跳转到添加页面
        goAddPage() {
            this.$router.push('/goods/add')
        }
    }
}
</script>

<style lang="less" scoped>

</style>
